系数加权法在多区域坐标转换中的应用

发布时间：2018-12-31 16:00

【摘要】：针对同一坐标系下多区域内重合点坐标转换结果不统一,限制测量成果综合利用问题,根据反距离权重法原理,提出一种多区域的平面坐标转换方法,并采用实际坐标数据进行验证计算。首先给出了进行坐标转换的计算模型,通过分析探究了坐标分布与其转换精度的特殊关系,引入了移动窗口提取区域内坐标,并对重合点的坐标转换参数进行插值计算,最后利用实际数据验证了算法的有效性和可靠性。结果表明:对比直接进行坐标转换的传统算法,引入移动窗口的分区系数加权转换法提高了坐标转换计算的精度,减小了冗余数据对坐标转换结果的影响,保证了多区域中重合点坐标转换结果的唯一性,坐标转换结果在X方向、Y方向的位置误差分别减小了30.45%和20.52%。
[Abstract]:According to the principle of inverse distance weight method, a multi-region coordinate conversion method is proposed to solve the problem that the coordinate conversion results of the same coordinate system are not uniform, and the comprehensive utilization of the measurement results is limited, according to the principle of the inverse distance weight method, a multi-region coordinate conversion method is proposed in this paper. And the actual coordinate data are used to verify the calculation. At first, the calculation model of coordinate transformation is given, and the special relation between coordinate distribution and transformation precision is analyzed, and the coordinate in the region is extracted by moving window, and the coordinate transformation parameters of coincidence point are calculated by interpolation. Finally, the validity and reliability of the algorithm are verified by the actual data. The results show that compared with the traditional algorithm of coordinate transformation directly, the weighted transformation method of partition coefficient of moving window is introduced to improve the accuracy of coordinate transformation calculation, and the influence of redundant data on coordinate conversion results is reduced. The uniqueness of coordinate transformation results of coincidence points in multiple regions is guaranteed. The position errors in X direction and Y direction are reduced by 30.45% and 20.52% respectively.
【作者单位】：中国矿业大学环境与测绘学院;
【分类号】：P226.3

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